Try to remain positive. I know how hard it is not to worry. But I remember reading somewhere if you worry about something and it never happens, you've worried in vain. If you worry about something that does happen, you've worried twice. And if you don't worry about something that does happen, you can spend all your energy in getting better. And, of course, if you never worry about something that never happens - that's the best scenario! Make sense?

Good luck with the surgery and everything that follows!